Andriy Atanasovych Melnyk (Ukrainian: Андрій Атанасович Мельник; 12 December 1890 – 1 November 1964) was a Ukrainian military and political leader best known for leading the Organisation of Ukrainian Nationalists from 1938 onwards and later the Melnykites (OUN-M) following a split with the more radical Banderite faction (OUN-B) in 1940. Born in Austrian Galicia, Melnyk volunteered in the Legion of Ukrainian Sich Riflemen at the outbreak of the First World War and was later captured by the Russians in 1916. He escaped captivity in late 1917 and served as a senior officer in the army of the Ukra